#include "bits/stdc++.h"

using namespace std;

const int N = 1 + 10;
int n;
int q[N], a[N];

int main()
{
    cin >> n;
    for (int i = 0; i < n; i++)
        cin >> a[i];

    int len = 0;
    q[0] = -2e9;

    for (int i = 0; i < n; i++)
    {
        int l = 0, r = len;
        while (l < r)
        {
            int mid = (l + r + 1) >> 1;
            if (q[mid] < a[i])
                l = mid;
            else
                r = mid - 1;
        }
        len = max(len, r + 1);
        q[r + 1] = a[i];
    }

    cout << len << endl;
    return 0;
}